OK. You have a bigger problem first.
If you can´t connect to AQ you´d try to start again by installing a new fw. You must can doing that. If not possible, maybe the board is bad or your FDTI cable is wrong or broken.
The solution I´ve shown above about DIMU red light "bypass" the problem, but at the end you can instal the DIMU deffault params and fly (with a little more of effort, but it works)
Angel